What actually makes a design system scalable in Figma?

We often talk about design systems in terms of components and tokens.

But after working with large Figma files, I noticed that scalability often breaks down in much simpler ways:

• Inconsistent naming
• Duplicate components across pages
• Deeply nested structures
• Detached instances
• Token usage drifting over time

Visually everything still looks fine, but structurally the system becomes harder to maintain.

Curious how other teams approach this.

Do you have a way to audit the structural quality of your Figma files, or is it mostly manual review?